SAE J1939 Programming with Arduino - SAE J1939 Simulation Example
This post is part of a series about SAE J1939 ECU Programming & Vehicle Bus Simulation with Arduino.
The following programming sample demonstrates effectively how easy simulating SAE J1939 data traffic can be (while the level of complexity can be easily adjusted to the application requirements).
However, before we dive into the actual coding, we need to design the simulated messages, i.e. we need to determine the CAN Bus 29-Bit message ID, which includes the actual PGN, the PGN’s priority, and the application’s source address.
SAE J1939 has become the accepted industry standard and the vehicle network technology of choice for off-highway machines in applications such as construction, material handling, and forestry machines. J1939 is a higher-layer protocol based on Controller Area Network (CAN). It provides serial data communications between microprocessor systems (also called Electronic Control Units - ECU) in any kind of heavy duty vehicles. The messages exchanged between these units can be data such as vehicle road speed, torque control message from the transmission to the engine, oil temperature, and many more.
A Comprehensible Guide to J1939 is the first work on J1939 besides the SAE J1939 standards collection. It provides profound information on the J1939 message format and network management combined with a high level of readability.